Bushing for bungs



- (No Model.)

B PENTLARGE.

BUSHING FOR BUNGS;

No. 384,387. Patented June, 12, 188,8.

Wzlinesseg 5 I UNITED STATES PATENT @rrrc RAFAEL PEN'TLARGE, OFBROOKLYN, NElV YORK.

BUSHING FOR BUNGS.

SPECIFICATION forming part of Letters Patent No. 384,387, dated June 12,1888.

Application filed February 23, 1888. Serial No. 264,977. (No model.)

To aZZ whom it may concern.-

Be it known that I, RAFAEL PENTLARGE, a citizen of the United States,residing in the city of Brooklyn, county of Kings, and State of NewYork, have made a new and useful lmprovenient in Bushings for Bungs; andI do hereby declare that the following is a full, clear, and accuratedescription thereof, which will enable others to practice my inventionwhen taken in connection with the accompanying drawings.

My invention relates to the structure of the metal bushings which arescrewed into the stave of the keg, and into which bushings the woodenbung is driven to close the barrel.

At Figure l is shown an ordinary bushing in its place in thebarrel-stave, the slave being in section; Fig. 2, the same parts areshown in section lettered with the same letters. Fig. 3 shows a sideview of one of my improved bushings. Fig. 4 shows a cross-sectionthereof. Fig. 5 shows my improved bushing screwed into a stave, and Fig.6 illustrates a case where the bushing has worked loose and has beentightened a number of times, as will be de scribed further on. Fig. 5shows the stavein section, and Fig. 6 shows the bushing in section also;but both figures represent the same bushing under different conditions.

In the drawings, A is the old form of bushing now commonly used, havingthe flange a and the screw-thread a. The stave of the keg is shown at B.It will be seen that the threads a screw into the wood of the stave Band that the lower part of the flange a rests flat upon the outside ofthe stave B. It will be evident that when this bushing is screwed homeand the bottom of the flange a is upon the stave that the bushing cannotbe farther screwed down. The trouble with this old form of bushing isthatit works loose and cannot be tightened. The heating of the keg inpitching the barrel heats the bushing, which then expands, and whileexpanding enlarges the hole in the stave, and in cooling contracts, andfinally, from this and many other causes equally important, thebushingworksloose inthestave. The general reinedyis to takeout the bushing,enlarge the hole in the stave, if necessary,and screw in a bushing oflarger diameter, or use the old bushing and some packing. Thisdifficulty with the ordinary bushing is-of constant occurrence.

My invention relates to a bushing equally simple and cheap, which can bekept tight in thestave for a much longer time. It consists of a bushingof metalhaving the usual thread on the outside of the cylindricalportion and the ordinary hole for the bung; but instead of having aflange with a horizontal face where it meets the outside of the stave itis provided with a flange formed at an angle of about fortyfive degreesor thereabout with the body. This angular face is provided with teethlike a rasp or file which will cut into the wood of the stave as thebushing is turned.

In all the figures, A is the bushing; a, the screw-threads on the bodyof the bushing.

B is the barrel-stave.

a is the flange of the bushing, and c is the cutting-face of the flange.

I have not shown a top view of the bushings, but it will be understoodthat they are always circular at all parts.

The cutting-face c of my new bushing has teeth or cuttingedges, asshown, Figs. 3 and 5. These may be teeth as in a milling-tool, or teethsuch as a rasp is provided with. They must cut when the bushing isturned in the direction in which it is rotated when being screwed intothe stave. These teeth are preferably cut by an appropriate cutter whenthe plain bushing is held upon a mandrel.

The bushing is rotated slowly under the cutter, which at each downstrokestrikes up a cutting-edge across the face of the flange c. Any othermethod of forming cutting-edges may be resorted to, and any form ofcutting-surfaces may be formed in the face 0 of the bushing, but theteeth must cut in the proper direction.

The bushing is screwed into a stave until, say, the threads are all inthe wood. In this condition the bushing can be used till it works loose,which it will do by reason of the same causes which tend to work the oldform of bushings loose.

We will suppose the bushing has worked itself loose: All that it is nownecessary to do is to turn the bushing with the usual tool made for thatpurpose, screwing it farther into the stave. Such operation is notprevented, as in the old form of bushing,by the flat flange, but

with my bushing can be readily accomplished, for the cutting-face c cutsand abrades the wood of the stave and permits of the bushing beingscrewed into the stave to a point farther than it had at first occupied.This screwing in of a loose bushing will tighten it in place, and theresult will be reached by a very little screwing in of the bushing. Whenit again works loose a further screwing up will tighten it again, and soon till the bushing has got so far through the stave as to renderfurther screwing up hazardous.

Figure 6 shows a bushing which has been a number of times screwed up,and which has sent its flange into the wood of the stave. Furtherscrewing up and consequent tightening could still be resorted to.Screwing up my bushing tightens it by reason of two causes: One is theentry of the thread into new wood, so long as the bushing has notpenetrated through the stave, and the other is that at each screwing-upoperation the cutting-flange c cuts or abrades the wood, but not asrapidly as the thread carries the bushing into the stave. Thus a Verylittle tightening or screwing up of the bushing causes the strain on theflange c to act to force the bushing out, while the thread tends to holditin place. Thus under the double strain the bushing is held fast andeach screwing up tends to renew the strain and consequent] y tighten thebush lng.

In the old bushings shown in Figs. 1 and 2, when the threads workedloose in the stave further renewal of the strain which held the bushingin place was impossible, as the flat flange prevented any fartherpenetration of the bushing.

In the case of my improved bushing should no cuttingteeth be formed onthe face 0, then this portion of the article soon makes a seat foritself and the bushing gets into the condition of those shown in Figs. 1and 2. The action of the cutters c is rather a grinding or abradingaction, breaking up the seat that would otherwise be formed for theflange and preventing the farther screwing in ofthe bushing to tightenit. By breaking up the wood, abrading, grinding, or cutting it, theflange is permitted to enter the wood of the stave a small distance ateach tightening operation.

Having described my invention what I claim, and desire to secure byLetters Patent, is-

1. The combination, in a metallic bushing for a bung, of ascrew-threaded body, and a flange having a face formed at an obliqueangle to the body, and cutting-teeth formed in the angular face of saidflange, as and for the purposes set forth.

2. The combination, in a metallic bushing for a bung, ofa screw-threadedbody, and a flange having a face formed at an angle to the body, andtransverse cutting-teeth in the said angular face of the flange,substantially as described.

Signed at the city of Brooklyn, county of Kings, and State of New Yorkthis 17th day of February, 1888. RAFAEL PENTLARGE. Witnesses:

LEON HIRSH, EMIL SCHOFTELD.

